Electric-arc lamp



H. T. HARRISON. ELECTRIC ARC LAMP. APPLICATION FILED AUG-23,1919.

Patented Oct. 12,1920.

l/VVEIVTOR Mm mm Ham/m 1% 4770194:

UNITED STATES PATENT OFFICE.

HAYDN THIES HARRISON, OF WESTMINSTER, ENGLAND.

ELECTRIC-ARC LAMP.

Original application flied February 4,

To all (0/: 0m it may concern:

Be it known that I, HAYDN Turns llAn- RlsoN, a subject of the King of (ireat Britain and Ireland, residing at the city of ll'cstminster, England, have invented Improvementsin or Relating to Electric-Arc Lamps, of which the following is a specitication.

This invention relates to that class of electric arc lamps in which the temperature of the carbons can be kept down by causing a suitable cooling medium, such as a spirit flame, to play about or come in contact with the carbons.

The present invention relates to improved means for supplying and regulating the alcohol or other combustible fluid to the cooling flame. whereby a more efficient cooling etl'ect is produced on the carbons.

The invention can advantageously be applied in connection with'electric arc lamps of the kind embodying an electric or other rotary device for rotating the carbons of the lamp.

In order that the invention may be readily understood reference will be made to the accompanying illustrative drawings in which- Figure 1 is an elevation showing an electric are lamp, embodying the invention, this lamp being of the type comprising means for rotating the carbons and such as described in my application for Letters Patent Serial No. 274,892 of which the present application is a division.

Fig. 2 is a. part sectional elevation to a larger scale than Fig. l, of the spirit tank and pump employed for feeding the spirit to the flame.

Fig. 3 is an elevation at right angles to 'Fig. 2 with a portion of the tank removed.

A and B are respectively the positive and negative carbons mounted in heads 1, 1 which are supported preferably at an angle to one another, as shown, in stationary parts (7 of the lamp and are respectively rotated by worm gearing 2, 2, and 3, 3, operated from a. driving wheel 4 rotated by an electric motor 5. The driving wheel 4 is secured on a vertical shaft 6 carrying the worm 2 of the worm gearing 2, 2* and is provided at a suitable position with a bevel wheel 7 engaging a bevel wheel 8 fixed to one end of a horizontal shaft 9 that is provided at its other end with a bevel Wheel Specification of Letters Patent.

Patented Oct. 12, 1920.

10. This wheel engages a bevel wheel 11 fixed on a rotatable shaft 12 connected bv a flexible coupling 13 to a shaft 14 on th which is fixed the worm 3 of the worm gearing 3, 3, all as described in my said former specification.

To regulate. in an ellicient manner the amountof alcohol or other liquid (hereinafter referred to as spirit) supplied to the flame used to bathe the carbons 15 for cooling purposes. there is provided a spirit. tank from which spirit is delivered by a pump in controllable quantity, it may be past a valve, to a vaporizer arranged to be heated by heat derived by radiation from the electric arc. The spirit tank can be arranged in various positions and spirit delivered therefrom by the pump to the vaporizer in various ways. In the example shown in the drawings, a spirit tank 45 is arranged at the base of the lamp and in the bottom of this tank is a pump immersed in the spirit. 46 is the pump barrel provided with a piston or plunger 47 that is forced downward by a coiled spring 47 and raised by a crank arm 48 that engages its upper end or head 47* and is connected to a block 49 carried by a spindle pivoted at 49 and prm'ided with a vertically adjustable cone 50. This cone, which forms a lever arm, is engaged and oscillated by a lever 51 pivoted on a stud 52 and operated by a cam 53 on the rotary vertical shaft 6 (Fig. 1). By adjusting the cone 50 vertically the stroke of the crank arm 48 and therefore the downward stroke of the pump plunger 47 and the amount of spirit delivered by the pump to the flame can be. easily and accurately regulated.

A spirit inlet of any suitable kind can be provided for the pump. Conveniently the inlet may be provided for by means of suitable leakage passages 46 arranged between the plunger 47 and the barrel 46 of the pump. The pump delivery passage 46 is controlled by a spring loaded non-return or delivery valve 54 to prevent any return of the spirit delivered by the pump.

The spirit. delivered by the pump 4(l47 is conveyed by a pipe 56 (Fig. 2) to a vaporizer (Fig. 1) consisting of a small chamber 57 provided with nozzles or jet devices 58 situated adjacent to the are between the carbon tips so that the heat radiated from the arc and absorbed by the nozzles or jet devices will be conducted to the chamber 57 and utilized to raise its temperature sufliciently high to vaporize the spirit delivered into it. a

The tank 45 is provided with a suitable filling aperture provided with a tightly fitting screw stopper 55. v

What I claim is 1. In an electric arc lamp of the kind in which the temperature of the carbons is kept downby the cooling action of a spirit flame, a vaporizer arranged in proximity to the electric arc formed between the carbons so as to become heated by heat derived therefrom and apump adapted to supply a volatilizable combustible liquid to said vaporizer.

2. In an electric arc lamp of the kind in which the temperature of the carbons is kept down by the cooling action of a spirit flame, a vaporizer arranged in proximity to the electric arc formed between the carbons so as to become heated by heat derived therefrom, a pump for supplying volatilizable combustible liquid to said vaporizer and means for regulating the quantity of liquidsupplied by said pump to said vaporizer.

3. In an electric arc lamp of the kind in which the temperature ofv the carbons is kept down by the cooling action of a spirit flame, a vaporizer arranged in proximity to the electric are formed between the carbons so as to become heated by heat derived therefrom, a vessel containing combustible liquid, means comprising a pump for supplying liquid in regulated quantity from said vessel to said vaporizer and means for operatingsaid pump from a movable part of 'the lamp.

4. In an electric arc lamp of the kind in which the temperature of the carbons is kept down by the cooling action of a spirit flame, a vaporizer arranged in proximity to the electric arc formed between the carbons so as to become heated by heat derived therefrom, a vessel containing combustible liquid,

tubular connecting means between said vaporizer and vessel, a pump for delivering combustible liquid from said vessel to said vaporizer through said tubular connecting means, means for operating said pump from a movable part of the lamp, and a valve for cont-rolling the flow of liquid through said tubular connecting means.

quantity of 5. In an electric arc lamp of the kind in which the temperature of the carbons is kept down by the cooling action .of a spirit flame, a vaporizer arranged in proximity to the electric arc formed between the carbons so as to become heated by heat derived therefrom, a tank containing combustible liquid, a pump immersed in said liquid and having an inlet adapted to be placed in communication with said tank and an outlet in communication with said vaporizer, a non-return valve controlling said outlet and means for operating the pump from a moving part of the lamp.

6. In an electric. arc lamp of the kind in which the temperature of the carbons is kept down by the cooling action of a spirit flame, a vaporizer arranged in proximity to the electric are formed between the carbons so-as to become heated by heat derived therefrom, a tank containing combustible liquid, a pump immersed in said liquid and having an inlet adapted to be placed in communication with said tank and an outlet in communication with said vaporizer, a

non-return valve controlling said outlet, means for operating said pump from a moving part of the lamp and means for varying the action of said operating means and the liquid delivered by said pump.

7. In an electric arc lamp of the kind in which the temperature of the carbons is kept down by the cooling action of a spirit flame, means for supplying and controlling spirit to produce such flame, said means comprising a vaporizer arranged in proximity to the electric arc formed between the carbons so as to become heated by heat derived therefrom, a tank containing combustible liquid, a pump immersed in said liquid and having an inlet adapted to be placed in communication with said tank and an outlet in communication with said vaporizer, a non-return valve controlling said outlet, a lever for operatlng said pump, an endwise ad uStable cone connected to said lever, a second lever adapted to oper-' ate the first mentioned lever through said cone, and means operated from a movable part of the lamp for operating said second lever.

Signed at Cavendish 28th day of July 1919.

HAYDN THIES HARRISON.

Sq, London, this 

